Spraying type battery tray

Abstract

The invention relates to a spraying type battery tray which comprises a tray body, a plurality of grooves distributed at equal intervals are formed in the tray body, a plurality of liquid outlet hole sets are formed in the grooves, and a protruding part is arranged between every two adjacent grooves and used for bearing a battery module. The heat dissipation device has the effects of balanced flow, smooth liquid flow and uniform heat dissipation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery liquid cooling, in particular to a spraying type battery tray. BACKGROUND

[0002] In a liquid-cooled energy storage system, the battery tray, as the core carrier of the battery module, not only needs to stably carry the battery to ensure the structural safety, but also needs to cooperate with the liquid cooling process to realize the orderly flow of the liquid, so as to ensure the consistency of the heat dissipation of the battery.

[0003] In the prior art, the groove distribution of the traditional battery tray does not match the row number of the battery module, and cannot collect the liquid of a single row in a directional manner; the liquid outlet holes are mostly single holes or are arranged loosely, and the liquid flow is easily affected by the flatness of the bottom surface after flowing out, resulting in uneven liquid cooling flow of the battery cells in the same row; and there is no flow guide structure at the edge of the tray, and the liquid is easy to overflow, further aggravating the flow imbalance, seriously affecting the consistency of the battery heat dissipation, and restricting the battery life and system safety. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a spraying type battery tray, which has the effects of flow balance, smooth liquid flow and uniform heat dissipation.

[0005] The above application of the present application is realized by the following technical scheme:

[0006] A spraying type battery tray comprises a tray body, a plurality of grooves are arranged at equal intervals on the tray body, a plurality of liquid outlet hole groups are arranged on the grooves, and a protruding portion is arranged between two adjacent grooves for carrying a battery module.

[0007] Through the above technical scheme, the tray body can not only stably carry the battery module, but also guide the flow of the liquid through the grooves arranged at intervals, so that the liquid flows out in an orderly manner after being aggregated in the corresponding row of grooves, and the flow distribution balance between the battery cells in the same row is realized.

[0008] As a further technical scheme of the present application: the number of grooves is the same as the row number of the battery module, and each groove is located directly below the battery module in the same row.

[0009] Through the above technical scheme, the grooves correspond to the row number of the battery module and are located directly below, so as to ensure that the liquid accurately acts on the battery cell area of the corresponding row, and optimize the flow distribution balance between the battery cells in the same row.

[0010] As a further technical scheme of the present application: the liquid outlet hole group comprises four liquid outlet small holes, the four liquid outlet small holes are arranged in a rectangular array, and adjacent two liquid outlet small holes are arranged closely.

[0011] By the technical scheme, the four liquid outlet small holes arranged in a rectangular array and closely arranged make the liquid flow spread out in all directions by surface tension when the liquid flows out, form coordinated liquid flow in the corresponding spray area, and the liquid flow in the central area naturally falls off under the action of gravity, thereby reducing the uncertainty of liquid flow in a single row caused by uneven bottom surface.

[0012] As a further technical scheme of the present application: the center distance between the two adjacent liquid outlet small holes in each group of liquid outlet holes is greater than the diameter of a single liquid outlet small hole and less than 2 times the diameter.

[0013] By the technical scheme, the distance design utilizes surface tension to make the liquid flow of adjacent liquid outlet small holes form a spread range that matches the distribution of the corresponding row of battery cells, thereby avoiding liquid accumulation caused by too small distance and preventing the formation of a cover gap caused by too large distance, so as to ensure the uniformity of liquid cooling and the balance of coverage in the row.

[0014] As a further technical scheme of the present application: the raised portion is in the shape of a positive trapezoid, and the raised portion includes a horizontal support surface and an arc-shaped transition surface connecting both sides of the support surface.

[0015] By the technical scheme, the raised portion in the shape of a positive trapezoid stably bears the battery module by using the horizontal support surface, and the arc-shaped transition surfaces on both sides can guide the smooth flow of the cooling liquid, thereby avoiding the formation of a liquid accumulation dead angle at the edge of the raised portion.

[0016] As a further technical scheme of the present application: the angle between the arc-shaped transition surface and the surface of the tray body is 30°-60°.

[0017] By the technical scheme, the angle design of the arc-shaped transition surface and the surface of the tray body can guide the liquid to flow smoothly through the raised portion into the corresponding groove, thereby preventing the liquid flow in the row from stagnating due to poor transition and ensuring the orderly aggregation of the liquid.

[0018] As a further technical scheme of the present application: the tray body is provided with flow guide bosses at the edges on both sides in the extension direction of the groove.

[0019] By the technical scheme, the flow guide bosses on both sides constrain the liquid flow range, prevent the liquid from overflowing from the edge to affect the aggregation amount of the liquid in the corresponding groove, and ensure the balanced flow distribution effect between the battery cells in the row.

[0020] In summary, the present application has at least one of the following beneficial technical effects:

[0021] 1. The present application discloses a spray type battery tray, which realizes stable bearing of a battery module and balanced flow distribution between battery cells in the same row by the cooperative design of the groove, liquid outlet hole group and raised portion of the tray body.

[0022] 2. The application discloses a spraying type battery tray which realizes coordinated liquid flow of liquid by surface tension and reduces flow uncertainty caused by uneven bottom surface through liquid outlet holes arranged in a rectangular array and with adaptive spacing.

[0023] 3. The application discloses a spraying type battery tray which realizes smooth gathering of liquid into grooves and guarantees stable effects of balancing flow of the row through structure design of positive ladder-shaped protruding parts and flow guide bosses. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the spraying type battery tray.

[0025] Figure 2 It is a front view of the spraying type battery tray.

[0026] Figure 3 It is a side view of the spraying type battery tray.

[0027] Figure 4 It is a side view of the spraying type battery tray on which a battery module is placed.

[0028] Figure 5 It is a right view of the spraying type battery tray on which a battery module is placed.

[0029] Reference signs: 1, tray body; 2, groove; 3, liquid outlet hole group; 31, liquid outlet small hole; 4, protruding part; 41, support surface; 42, arc-shaped transition surface; 5, battery module; 6, flow guide boss. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application; obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the application belong to the protection scope of the application.

[0031] In the description of the application, it should be noted that the orientations or position relationships indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like are the orientations or position relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example:

[0034] Reference Figure 1 The present invention discloses a spray-type battery tray, which includes a tray body 1. The tray body 1 has 13 equally spaced grooves 2. The surface of the grooves 2 is distributed with 8 sets of liquid outlet holes 3 along the column direction. A protrusion 4 is provided between adjacent grooves 2 for supporting battery modules 5.

[0035] Reference Figure 4 and Figure 5 The number of grooves 2 is consistent with the number of rows of battery modules 5, corresponding to a total of 13 rows of battery modules 5, and each groove 2 is precisely located directly below the same row of battery modules 5; the battery modules 5 are arranged in 4 columns, and each battery module contains several cells; in each column, each end of a single cell corresponds to a set of liquid outlet holes 3, that is, every two sets of liquid outlet holes 3 correspond to one cell, ensuring that the heat and coolant of each row of cells can be collected directionally by dedicated grooves.

[0036] Reference Figure 1 and Figure 2 The outlet hole group 3 consists of four outlet holes 31 arranged in a 2×2 rectangular array. In each outlet hole group 3, the center-to-center distance between adjacent outlet holes 31 is greater than the diameter of a single outlet hole 31 but less than twice that diameter. This allows the coolant to fuse into a continuous liquid film after flowing out, thanks to surface tension, achieving gapless coverage of the battery surface. For example, when the diameter of the outlet hole 31 is set to 3mm and the center-to-center distance between adjacent holes is set to 4.5mm, the coolant will flow out from the four holes. The liquid flow from each hole will diffuse in all directions under the action of surface tension (diffusion radius of about 2.5mm). The diffusion ranges of adjacent holes overlap (overlap width of about 0.5mm), eventually fusing into a complete and continuous liquid film on the battery surface. This avoids excessive liquid accumulation due to too small a spacing (e.g., 2.5mm) and gaps due to too large a spacing (e.g., 6.5mm), thus achieving seamless coverage of the battery surface.

[0037] Reference Figure 3, the convex part 4 is a positive step, and the integrated horizontal supporting surface 41 and the arc-shaped transition surface 42 connected on both sides thereof; the included angle between the arc-shaped transition surface 42 and the surface of the tray body 1 is 30-60 degrees. The selection of the angle range is based on the flow characteristics of the cooling liquid and the structural adaptability. If the included angle is less than 30 degrees, the arc-shaped transition surface 42 is too flat, the flow rate of the cooling liquid flowing through is reduced, and the stagnation of the liquid is easily formed at the connection between the arc-shaped transition surface 42 and the supporting surface 41 due to the action of gravity, and the liquid cannot quickly flow into the groove 2; if the included angle is greater than 60 degrees, the arc-shaped transition surface 42 is too steep, and the splashing of the cooling liquid flowing through is caused due to the excessive gravity acceleration, and part of the liquid may splash directly to the edge of the tray body 1 or the adjacent area, and cannot be accurately collected into the groove 2; and the included angle of 30-60 degrees can balance the flow rate and the flow stability, can guide the smooth flow of the cooling liquid along the transition surface at a moderate speed, can avoid the stagnation of the liquid caused by the too flat angle or the splashing caused by the too steep angle, and can ensure that the liquid is efficiently collected into the groove 2, and provides a basis for subsequent flow balance.

[0038] Referring to Figure 1 , the two side edges of the tray body 1 along the extension direction of the groove 2 are symmetrically provided with the flow guide boss 6 for restraining the flow range of the cooling liquid and preventing the overflow of the cooling liquid from the tray edge.

[0039] The working process of the spray type battery tray is as follows:

[0040] The cooling liquid enters from the top of the system, first flows through the surface of the battery module 5 and absorbs heat, and then flows downward along the battery module 5 to the tray area. After reaching the tray, the cooling liquid naturally flows into the adjacent groove 2 along the arc-shaped transition surface 42 of the convex part 4, and the cooling liquid corresponding to the same row of battery modules 5 is gradually aggregated in the corresponding groove 2.

[0041] When the cooling liquid in the groove 2 is collected to a certain amount, it flows out through the liquid outlet hole group 3. The cooling liquid flowing out from the liquid outlet hole 31 diffuses and merges into a continuous liquid film under the action of surface tension, and when the liquid film expands to the central area, a liquid column is formed due to the action of gravity, and the flowing path is not affected by the bottom surface state.

[0042] In this process, the flow guide boss 6 blocks the overflow of the cooling liquid to the tray edge, and ensures that the liquid is fully involved in the circulation; the falling cooling liquid finally enters the liquid cooling unit for temperature control treatment, and then is retransported to the top of the system to complete a liquid cooling cycle.

[0043] The implementation principle of the present application is that through the cooperation of various structures, the battery can be stably carried, and the cooling liquid can be uniformly flowed to ensure the heat dissipation effect. Specifically, the horizontal supporting surface 41 of the protruding part 4 stably supports the battery module 5, preventing the battery from shaking and affecting cooling; the inclined angle of the arc-shaped transition surface 42 on both sides is between 30° and 60°, which can guide the cooling liquid to smoothly flow into the adjacent groove 2, and the liquid will not splash because the angle is too steep, and the liquid will not accumulate in the corner because the angle is too slow. The number of grooves 2 is the same as the number of rows of battery modules 5, and each groove 2 is directly below the same row of battery modules 5, so that the cooling liquid flowing down from the row of battery modules 5 can be completely collected in the corresponding groove 2, facilitating centralized processing. The liquid outlet hole group 3 on the groove 2 is composed of four liquid outlet small holes 31, which are arranged in a rectangle. The spacing between adjacent liquid outlet small holes 31 is greater than the diameter of a single liquid outlet small hole 31, but less than twice the diameter. This arrangement can use the surface tension of the liquid to gather and merge the cooling liquid flowing out of the liquid outlet small holes 31 into a continuous liquid film in the middle, and finally flow down naturally from the center position due to gravity, avoiding the problem that the liquid does not know where to flow because the bottom surface of the tray body 1 is uneven. In addition, the flow guide boss 6 on both sides of the tray body 1 can block the cooling liquid, preventing it from flowing out from the edge, ensuring that all the liquid can flow and circulate in the groove 2, and ultimately achieving the balance of the cooling liquid flow between the same row of battery modules 5, making the heat dissipation more uniform.

[0044] The embodiments of the specific implementation are the preferred embodiments of the present application, but do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A spray-type battery tray, characterized in that, The device includes a tray body (1), on which a plurality of grooves (2) are provided at equal intervals, and a plurality of liquid outlet holes (3) are provided on the grooves (2), and a protrusion (4) is provided between two adjacent grooves (2) for supporting the battery module (5).

2. The spray-type battery tray according to claim 1, characterized in that, The number of grooves (2) is the same as the number of rows of battery modules (5), and each groove (2) is located directly below the battery modules (5) in the same row.

3. A spray-type battery tray according to claim 1, characterized in that, The liquid outlet hole group (3) includes four liquid outlet holes (31), which are arranged in a rectangular array, and two adjacent liquid outlet holes (31) are arranged closely together.

4. A spray-type battery tray according to claim 3, characterized in that, The center-to-center distance between two adjacent outlet holes (31) in each group of outlet holes (3) is greater than the diameter of a single outlet hole (31) but less than twice that diameter.

5. A spray-type battery tray according to claim 1, characterized in that, The protrusion (4) is in the shape of a trapezoid, and the protrusion (4) includes a horizontal support surface (41) and an arc-shaped transition surface (42) connecting the two sides of the support surface (41).

6. A spray-type battery tray according to claim 5, characterized in that, The angle between the arc-shaped transition surface (42) and the surface of the tray body (1) is 30° to 60°.

7. A spray-type battery tray according to claim 1, characterized in that, The tray body (1) is provided with flow guide protrusions (6) on both sides of the extension direction of the groove (2).

Images